隻有光線照射區域，才有殺微生物的作用。家裏物件多，無法普照。紫外線照射空氣，會產生負氧離子和自由基，誘發哮喘等疾病

來源: fuz 於 2020-02-02 14:23:26 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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